Differential amplifier arrangement with current regulating circuit and method for operating a differential amplifier arrangement
US7095281B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 2004 |
| Grant date | Aug 22, 2006 |
| Priority date | — |
| Expiry date | Oct 7, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45371
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Provision is made of a differential amplifier arrangement with a current source (S1), two controllable paths (T1, T2), which are in each case coupled by one terminal to the current source (S1) and the control terminals of which form the input of the differential amplifier arrangement. Via a respective cascode circuit (K1, K2), a load (L1, L2) is respectively connected to the first and second controllable paths (T1, T2). At least one tap (A1) between one of the loads and one of the cascode circuits forms an output of the differential amplifier arrangement. Provision is made of a comparison means (D1) having two inputs, which is designed for outputting a control signal dependent on a comparison. A first input is coupled to the first tap (A1) and the second input is designed for feeding a reference signal. Furthermore, the differential amplifier arrangement contains a regulable current source (G1), the control input of which is connected to the output of the comparison means and the current output of which is connected to the second terminal (P1) of at least the first controllable path (T1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.